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Test method for compositions of fine silica powder

A high-purity quartz sand, component detection technology, applied in the direction of removing a certain component and weighing, etc., can solve the problems of cumbersome analysis process, high main content analysis results, low analysis results, etc., to improve analysis efficiency and analysis steps. The effect of simplifying and improving efficiency

Inactive Publication Date: 2012-07-25
成都中光电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to: aim at the defects of cumbersome analysis process, high main content analysis results due to the influence of ignition loss, and low analysis results due to alumina transformation in the current general-purpose quartz sand analysis method, and propose new detection method

Method used

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  • Test method for compositions of fine silica powder
  • Test method for compositions of fine silica powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dry the quartz sand sample in a 105°C oven to constant weight in advance to remove the influence of moisture.

[0025] (2) Place the platinum crucible on the electric furnace with constant weight. Transfer to a desiccator for later use. Note its weight m1.

[0026] (3) Weigh 1.0000g of the dried quartz sand sample into the platinum crucible that has been treated with constant weight, and record the sample weight m0. Wet the sample with a small amount of water and add 5 drops of 50% H by volume 2 SO 4 , add 40ml HF (concentrated), and add 2ml 50% volume concentration of HNO 3 Solution to help dissolve. Heat on the electric stove at low temperature until the white smoke disappears. At the same time do blank test and parallel test.

[0027] (4) After the white smoke is exhausted, increase the temperature of the electric furnace to the temperature of the previous constant-weight crucible, and let the crucible with residue continue to have a constant weight on the ...

Embodiment 2

[0035] (1) Dry the quartz sand sample in a 105°C oven to constant weight in advance to remove the influence of moisture.

[0036] (2) Place the platinum crucible on the electric furnace with constant weight. Transfer to a desiccator for later use. Note its weight m1.

[0037] (3) Weigh 1.0000g of the dried quartz sand sample into the platinum crucible that has been treated with constant weight, and record the sample weight m0. Wet the sample with a small amount of water and add 5 drops of concentrated perchloric acid (HClO 4 The content is 60-70%), add 40ml HF (concentrated), and add 2ml 50% volume concentration of HNO 3 Solution to help dissolve. Heat on the electric stove at low temperature until the white smoke disappears. At the same time do blank test and parallel test.

[0038] (4) After the white smoke is exhausted, increase the temperature of the electric furnace to the temperature of the previous constant-weight crucible, and let the crucible with residue continu...

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Abstract

The invention discloses a test method for compositions of fine silica powder, which belongs to the field of test methods in the glass manufacture field and sequentially comprises the following steps of: allowing a silica powder sample to be constant in weight, allowing a crucible to be constant in weight, recording the weight m1 of the crucible, wetting the silica powder with the weight m0 with water, adding appropriate amount of smoke agents, adding HF (hydrofluoric acid) to decompose SiO2, supplementing strong acid until white smoke is exhausted, heating the crucible to be at the temperature at previous constant weight to further allow the crucible to be constant in weight on an electric furnace, recording the gross weight m2 of the crucible and residues, calculating the main content of the SiO2 by using a formula, namely (m1+m0-m2) / m0*100%, dissolving the residues to be clear with strong acid solvent, and detecting the content of impurity elements on ICP (inductively coupled plasma ectrometer) by using a standard curve method. The test method overcomes the defects of the existing method that the analysis process is complicated, the main content analysis result becomes larger due to the effect of loss on ignition, and the analysis result becomes smaller due to transformation of aluminum oxide.

Description

technical field [0001] The invention belongs to the field of detection methods in the field of glass manufacturing. Background technique [0002] At present, most of the analysis and detection of quartz sand adopts the following method: that is, it is processed in a muffle furnace at 1100°C to calculate the main SiO 2 content. The remaining residue is melted with alkali, extracted with water, filtered, developed with ammonium molybdate, and detected with a spectrophotometer for residual silicon. At the same time, according to the main SiO 2 method to process a sample for the detection of impurities. [0003] The existing analysis method is not suitable for high-content quartz sand, and has the following defects: [0004] 1. High content of SiO in quartz sand 2 The content is usually above 99.7%, and the residual silicon is almost negligible, and the determination procedure of residual silicon is complicated, the data is greatly affected by the environment, and the refer...

Claims

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Application Information

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IPC IPC(8): G01N5/04
Inventor 易元李兆廷
Owner 成都中光电科技有限公司